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1) A person (male or female) who brings a negtive feeling into any situation.

2) A person with a bad attitude.
1) That George Bush is a total bumout.

2) I don't hang out with Jake anymore, he is a big bumout.
bumout by Ray Beck June 6, 2005
Related Words

Bumfutawagee 

The buds a stoner saves in anticipation for a dry spell or a big event (eg the after party for a show).
Not Berowne: This one is going into my BUMFUTAWAGEE.

Berowne: Allright.
Bumfutawagee by Berowne March 18, 2009
A hard ball shaped turd that fires out of the anus at a considerable speed when pushed out of bum crack making a similar sound of a pebble being thrown into a lake.
Oh no!! I just dropped a seriously big bumnut and have just experienced a splash back on the arse hole!!
BumNut by Isla HG June 2, 2019
When you have absolutely nothing to do and waste time when you could be doing something productive (i.e. going outside).
Man I ain't got shit to do today, I'll just bum out.
bum out by ubersmilee June 9, 2009
A chillout session after a party or other major event; usually in the afternoon.
1. Jun I'm soo sick of partying - is there gonna be a bumpout after this?

2. Jun are you gonna come to the bumpout?
bumpout by Dukeee August 22, 2007
A piece of harded exrement, that clings to the hair around ones anus. Some bumnuts cling to the hair so well that removing them can rip the hair out from the root which can be painful.
He doesn't wipe his backside, he will get bumnuts.
bumnut by Kai_76 February 18, 2008